import { useRef } from 'react';

function depsAreSame(oldDeps: any[], deps: any[]): boolean {
    if (oldDeps === deps) return true
    for (const i in oldDeps) {
        if (oldDeps[i] !== deps[i]) return false
    }
    return true
}

export default <T>(factory: () => T, deps: any[]) => {
    const { current } = useRef({
        deps,
        obj: undefined as undefined | T,
        initialized: false,
    })

    if (current.initialized === false || !depsAreSame(current.deps, deps)) {
        current.deps = deps
        current.obj = factory()
        current.initialized = true
    }
    return current.obj as T
}